| Project/Area Number |
61850051
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
電子材料工学
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| Research Institution | Hosei university |
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Principal Investigator |
TSUYA Noboru Professor,College of Engineering, Hose University, 工学部, 教授 (00006206)
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| Co-Investigator(Kenkyū-buntansha) |
TOKUSIMA Tadao YAMAHA R&D Laboratgory, 技研主任
ARAI Kenichi Professor, Institute of Electric Communication,Tohoku University, 通研, 教授 (40006268)
田中 翠 お茶水大, 理学部, 教授 (30017181)
NAKAMURA Hideo Instuctor,College of Engineering, Hose University, 工学部, 助手 (10061201)
SAITO Yoshifuru Professor,College of Engineering, Hose University, 工学部, 教授 (80097146)
HAYANO Seiji Instructor,College of Engineering, Hosei University
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1987: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1986: ¥6,300,000 (Direct Cost: ¥6,300,000)
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| Keywords | Alumite / Disc / Pore / Perpendicular / Nodic / Oxidation / ディスク / 磁気媒体 / メスバウアー / 異方性 |
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| Research Abstract |
Details of method are given for measurements of perpendicular magnetic alumite discs obtained by an aid of anodization with the additional new process named "pore widening" which was effective to control the coersive force. The electro-deposited fine iron needles were in single crystalline state. The perpendicular orientation of magnetization was confirmed. The magnetic recording characteristics of rigid discs indicated satisfactor results as perpendicular recording medium. The recording characteristics of 3.k and 5.25 inch rigid discs were evaluated. A recording density D_<50> of 50 KBPI was attained for the disc with a media thickness 1.5 <micrn>m. The environmental test under an atomsphere of 40 ゜C, 90% R.H. over 1000 hr affirmed the stability of the alumite disc with 250A SiO2 overcoat. The proposed perpendicular media by anodic oxidation method show a high potential for practical use because of its mass productivity.
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